:root{
  --paper: #ECE9E1;
  --paper-raised: #F5F3EC;
  --ink: #19065f;
  --ink-soft: #6B675E;
  --line: #D6D1C4;
  --accent: #B5502E;
  --radius: 6px;

  --m0:  #6E7B6E; /* Jan  - frost sage   */
  --m1:  #7C8FA6; /* Feb  - pale slate   */
  --m2:  #8DA06A; /* Mar  - budding green*/
  --m3:  #C7A23E; /* Apr  - pollen gold  */
  --m4:  #D98B3E; /* May  - marigold     */
  --m5:  #CD6B3E; /* Jun  - clay         */
  --m6:  #C98A3E; /* Jul  - late-summer ochre */
  --m7:  #e2c000; /* Aug  - burnt orange */
  --m8:  #8fd9f0; /* Sep  - rust brown   */
  --m9:  #eb2121; /* Oct  - umber        */
  --m10: #4657f0; /* Nov  - bark         */
  --m11: #ffffff; /* Dec  - slate blue   */
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Source Serif 4', Georgia, serif;
  min-height:100vh;
}

.topbar{
  position:sticky; top:0; z-index:5;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1200px; margin:0 auto;
  padding:18px clamp(14px,3vw,32px) 12px;
}
.topbar h1{
  font-size:clamp(1.1rem,2.4vw,1.5rem);
  font-weight:600;
  margin:0 0 2px;
  letter-spacing:.01em;
}
.mark{color:var(--accent); font-size:.7em;}
.subtitle{
  margin:0;
  font-family:'JetBrains Mono',monospace;
  font-size:.72rem;
  letter-spacing:.04em;
  text-transform:uppercase;
  color:var(--ink-soft);
}

main{max-width:1200px; margin:0 auto; padding:20px clamp(14px,3vw,32px) 60px;}

.legend{
  display:flex; flex-wrap:wrap; gap:10px;
  margin-bottom:16px;
  font-family:'JetBrains Mono',monospace;
  font-size:.68rem; text-transform:uppercase; letter-spacing:.04em;
  color:var(--ink-soft);
}
.legend span{
  display:inline-flex; align-items:center; gap:5px;
}
.legend i{width:9px;height:9px;border-radius:2px;display:inline-block;}

.grid{
  display:flex; flex-wrap:wrap;
  gap:clamp(4px,.9vw,7px);
  align-content:flex-start;
}

.month-chip{
  flex-basis:100%;
  font-family:'JetBrains Mono',monospace;
  font-size:.7rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--ink-soft);
  padding:16px 2px 4px;
  border-top:1px solid var(--line);
  margin-top:4px;
}
.grid > .month-chip:first-child{border-top:none; padding-top:0; margin-top:0;}

.day{
  --accent-c: var(--m0);
  position:relative;
  width:clamp(38px,7.4vw,58px);
  height:clamp(38px,7.4vw,58px);
  border-radius:var(--radius);
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-left:3px solid var(--accent-c);
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  cursor:pointer;
  font-family:'JetBrains Mono',monospace;
  color:var(--ink);
  transition:transform .12s ease, box-shadow .12s ease;
  user-select:none;
}
.day:hover, .day:focus-visible{
  transform:translateY(-2px);
  box-shadow:0 3px 10px rgba(34,32,28,.15);
  outline:none;
}
.day .num{font-size:clamp(.72rem,1.6vw,.95rem); font-weight:500; line-height:1;}
.day .dow{font-size:.55rem; color:var(--ink-soft); margin-top:2px; letter-spacing:.03em;}

.day .dot{
  position:absolute; bottom:4px; right:4px;
  width:5px; height:5px; border-radius:50%;
  background:var(--accent-c);
}

.day.today{
  background:var(--ink);
  border-color:var(--ink);
}
.day.today .num, .day.today .dow{color:var(--paper);}
.day.today::after{
  content:"today";
  position:absolute; top:-9px; left:50%; transform:translateX(-50%);
  font-size:.5rem; letter-spacing:.06em; text-transform:uppercase;
  background:var(--accent-c); color:#000000;
  padding:1px 5px; border-radius:3px; white-space:nowrap;
}

.day.past{
  opacity:.42;
  cursor:default;
}
.day.past:hover{transform:none; box-shadow:none;}
.day.past::before{
  content:"";
  position:absolute; left:8%; right:8%; top:50%;
  border-top:1.4px solid var(--ink);
  transform:rotate(-8deg);
}

@media (prefers-reduced-motion: reduce){
  .day{transition:none;}
}

/* ---------- Detail panel ---------- */
.overlay{
  position:fixed; inset:0; background:rgba(34,32,28,.35);
  backdrop-filter:blur(1px);
  z-index:20;
}
.panel{
  position:fixed; z-index:21;
  right:0; top:0; bottom:0;
  width:min(420px,100%);
  background:var(--paper-raised);
  border-left:1px solid var(--line);
  padding:22px clamp(16px,4vw,28px);
  display:flex; flex-direction:column;
  box-shadow:-8px 0 30px rgba(0,0,0,.12);
}
@media (max-width:520px){
  .panel{
    right:0; left:0; top:auto; bottom:0; width:auto;
    border-left:none; border-top:1px solid var(--line);
    border-radius:14px 14px 0 0;
    max-height:80vh;
  }
}
.panel-head{display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:14px;}
.panel-weekday{
  margin:0; font-family:'JetBrains Mono',monospace; font-size:.72rem;
  text-transform:uppercase; letter-spacing:.06em; color:var(--ink-soft);
}
.panel-date{margin:2px 0 0; font-size:1.4rem; font-weight:600;}
.icon-btn{
  background:none; border:none; font-size:1rem; cursor:pointer; color:var(--ink-soft);
  padding:4px 8px;
}
.icon-btn:hover{color:var(--ink);}
.panel-text{
  flex:1; min-height:160px; resize:vertical;
  font-family:'Source Serif 4',Georgia,serif; font-size:1rem; line-height:1.5;
  padding:12px; border:1px solid var(--line); border-radius:8px;
  background:var(--paper); color:var(--ink);
}
.panel-text:focus{outline:2px solid var(--accent); outline-offset:1px;}
.panel-actions{display:flex; justify-content:space-between; gap:10px; margin-top:14px;}
.btn{
  font-family:'JetBrains Mono',monospace; font-size:.78rem; text-transform:uppercase; letter-spacing:.04em;
  padding:10px 16px; border-radius:6px; border:1px solid var(--line); cursor:pointer;
  background:var(--paper);
}
.btn-primary{background:var(--ink); color:var(--paper); border-color:var(--ink);}
.btn-ghost{color:var(--ink-soft);}
.btn:hover{opacity:.85;}
.panel-status{
  font-family:'JetBrains Mono',monospace; font-size:.68rem; color:var(--ink-soft);
  min-height:1em; margin:8px 0 0;
}

/* ---------- Tooltip ---------- */
.tooltip{
  position:fixed; z-index:30;
  max-width:220px;
  background:var(--ink); color:var(--paper);
  font-size:.78rem; line-height:1.4;
  padding:8px 10px; border-radius:6px;
  pointer-events:none;
  box-shadow:0 4px 14px rgba(0,0,0,.25);
}

.foot{
  max-width:1200px; margin:0 auto; padding:0 clamp(14px,3vw,32px) 40px;
  font-family:'JetBrains Mono',monospace; font-size:.7rem; color:var(--ink-soft);
}

[hidden] {
  display: none !important;
}